重命名匹配中的枚举字段(rust)

enum Message {
    Quit,
    Move { x: i32, y: i32 },
    Write(String),
    ChangeColor(i32, i32, i32),
}

fn process_message(msg: Message) {
    match msg {
        Message::Quit => println!("The Quit variant has no data to destructure."),
        Message::Move { x, y } => println!("Move in the x direction {} and in the y direction {}", x, y),
        Message::Write(text) => println!("Text message: {}", text),
        Message::ChangeColor(r, g, b) => println!("Change the color to red {}, green {}, and blue {}", r, g, b),
    }
}

fn process_message(msg: Message) {
    match msg {
        Message::Quit => println!("Quitting..."),
        _ => println!("Unhandled message type!"),
    }
}

enum Message {
    Quit,
    Move { x: i32, y: i32 },
    Write(String),
    ChangeColor(i32, i32, i32),
}

fn process_message(msg: Message) {
    match msg {
        Message::Quit => println!("Quitting..."),
        Message::Move { x, y } => println!("Moving to coordinates ({}, {})", x, y),
        Message::Write(text) => println!("Writing message: {}", text),
        Message::ChangeColor(r, g, b) => println!("Changing color to RGB({}, {}, {})", r, g, b),
    }
}

fn main() {
    let msg1 = Message::Move { x: 10, y: 20 };
    let msg2 = Message::Write(String::from("Hello, world!"));
    let msg3 = Message::ChangeColor(255, 0, 0);
    let msg4 = Message::Quit;

    process_message(msg1);
    process_message(msg2);
    process_message(msg3);
    process_message(msg4);
}